Effects of Different Laser Treatments on Some Properties of the Zirconia-Porcelain Interface Zirconia-Porcelain Bonding in Response to Lasers Effect
Journal of Lasers in Medical Sciences,
Vol. 12 (2021),
13 February 2021
,
Page e2
Abstract
Introduction: This study was performed to compare the effect of Fractional CO2 laser or Q switched Nd: YAG laser of surface treatment on the shear bond strength of zirconia-porcelain interface.
Methods: Fractional CO2 laser at 30 W, 2 ms, time interval 1 ms, the distance between spots 0.3 mm, and the number of scans is (4) or Q switched Nd: YAG laser at 30 J/mm2 and 10 Hz were used to assess the shear bond strength of zirconia to porcelain. pre-sintered zirconia specimens were divided into three groups (n = 10) according to the surface treatment technique used: (a) untreated (Control) group; (b) CO2 group; (c) Nd: YAG group. All samples were then sintered and veneered with porcelain according to the manufacturer’s instructions. Surface morphology was examined using a light microscope, the surface roughness test was done by the atomic force microscope (AFM), and the shear bond strength (SBS) test was done by a universal testing machine. After debonding following the shear bond test, zirconia surfaces were examined under a light microscope to determine their fracture mode.
Results: The Results of this study showed that the lowest SBS was recorded in the control group, and the highest SBS recorded in the Fractional CO2 group, followed by the Q switched Nd: YAG laser group, as well as an increase in surface roughness and change in the morphology and mode of failure in the experimental groups.
Conclusion: This study shows that Fractional CO2 laser and Q switched Nd: YAG laser treatments significantly increase the bond strength than untreated zirconia.
- Nd:YAG laser; Fractional CO2 laser; Shear bond strength; Zirconia; Porcelain
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References
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